US38946A - Improvement in ventilators - Google Patents

Description

- F. D. CHASE.

Ventilator. No. 38,946. Patented June 23. 1863.

UNITED STATES PATENT OFFICE. I

FREDERIO D. CHASE, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN VENTILATORS.

Specification forming part of Letters Patent No. 38,946, dated June 23, 1863.

To all whom it may concern.-

Be it known that I, FREDERIC D. CHASE, a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Deck, Floor, or Roof Guard and Ventilator; and I do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of which Figure 1 is a top view, Fig. 2 a bottom view, Fig. 3 a side elevation, and Fig. 4 a vertical section, of it.

The said guard and ventilator is not only for the purpose of ventilating an apirtment of a building, or the hold. or cabin ot' a vessel, but isto protect the deck of such vessel or the roof or floor of the building through which a smoke-pipe may be run from being set on fire or burned by heat radiated from such pipe.

In the drawings, A and B are two flat circular annuli, the upper one being fastened to and made to encompass a pipe, 0. A hollow conic frustum, D, is fixed at its larger end upon the lower plate, B, and at its upper or smaller end or lesser base (which is open) it receives the pipe or tube 0. This tube 0 should be so adapted to the opening at the top of the portion D as to fit closely to its periphery and be capable of being slid vertically within the same, in order to adjust the distance of the plate A from the plate B, the same being to enable the apparatus to be adapted to the deck of a vessel. As the decks of different vessels may vary more or less in thickness, the two plates A and B, by which the apparatus is to be secured to a deck, (one plate being fastened to the upper and the other to the lower surface of the deck,) can thus be brought into proper contact with a deck, provided it may have a thickness which may be less than the depth of the conical frustum, and not greater than such depth and the extent of projection of the tube 0 below the plate A. A smoke=pipe, E, extends up through the plate B and into the tube 0, there being an air-space, a, arranged between the pipes E and O, which are concentric with each other. The lower end of this air-space is open, while the upper part of it is covered or capped by an annular rain-guard, F, between which and the top of the smoke-pipe E there is an annular opening, Z1, for discharge of air from the space a into a column of smoke while flowing through the pipe E and out of its upper end. The interior of the conic frustum D forms an air-chamber or mouth to the passage on, the bottom of such chamber having a series of openings, 0 c a, which are provided with a register, H, for closing them, (more or less,) as circumstances may require. The

tube 0 is surmounted by a chimney or flue be, and to serve as a means of discharging its.

smoke. The heat radiated from the pipe E will induce a current of air to flow through the openings 0 c and into the chamber G, from whence it will pass up through the passage (1 and through the annular opening I), and into the pipe E and cap I, from whence it will be discharged with the smoke. Thiscurrent of air will not only produce ventilation of the apartment below the apparatus, but will serve to carry off the heat radiated from the external surface of the pipe E, and thus will prevent the said pipe from setting fire to or ch arring the wood-work of the deck or floor or root, within which the parts G and D may be situated. The rim-cap F operates to prevent any rain or snow from passing into the upper part of the passage a during a storm, and while the apparatus may be in use.

I claim-- 1. In the above-described deck guard and ventilator, the combination of the annular rain-cap F and air-opening b with thesmokepipe E, the ventilating-passage a, and its airreceiver G, provided with inlets and a register, as specified.

2. The combination of the cap-plate A with the air-receiver G, its smoke-pipe E and fastening-plate B, by means of the adjustable pipe 0, applied to and so as to be capable of sliding into the frustum D, and made to circumscribe the smoke-pipe, substantially as and for the purposes hereinbefore specified.

FREDERIG D. CHASE.

Witnesses:

R. H. EDDY, F. P. HALE.

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